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<h2 id="motivation">Motivation</h2>
<p>&#x795E;&#x7ECF;&#x7F51;&#x7EDC;&#x5728;&#x8BA1;&#x7B97;&#x673A;&#x89C6;&#x89C9;&#x65B9;&#x9762;&#x7684;&#x6210;&#x529F;&#x5F97;&#x76CA;&#x4E8E;&#x5377;&#x79EF;&#x795E;&#x7ECF;&#x7F51;&#x7EDC;&#xFF0C;&#x7136;&#x800C;&#xFF0C;&#x73B0;&#x6709;&#x7684;&#x8BB8;&#x591A;&#x6210;&#x529F;&#x7684;&#x795E;&#x7ECF;&#x7F51;&#x7EDC;&#x7ED3;&#x6784;&#x90FD;&#x8981;&#x6C42;&#x8F93;&#x5165;&#x4E3A;&#x4E00;&#x4E2A;&#x56FA;&#x5B9A;&#x7684;&#x5C3A;&#x5BF8;&#xFF08;&#x6BD4;&#x5982;224x224,299x299&#xFF09;&#xFF0C;&#x4F20;&#x5165;&#x4E00;&#x5F20;&#x56FE;&#x50CF;&#xFF0C;&#x9700;&#x8981;&#x5BF9;&#x5B83;&#x505A;&#x62C9;&#x4F38;&#x6216;&#x8005;&#x88C1;&#x526A;&#xFF0C;&#x518D;&#x8F93;&#x5165;&#x5230;&#x7F51;&#x7EDC;&#x4E2D;&#x8FDB;&#x884C;&#x8FD0;&#x7B97;&#x3002;</p>
<p><img src="sppnet_0.png" alt="">
&#x7136;&#x800C;&#xFF0C;&#x88C1;&#x526A;&#x53EF;&#x80FD;&#x4F1A;&#x4E22;&#x5931;&#x4FE1;&#x606F;&#xFF0C;&#x62C9;&#x4F38;&#x4F1A;&#x4F7F;&#x5F97;&#x56FE;&#x50CF;&#x53D8;&#x5F62;&#xFF0C;&#x8FD9;&#x4E9B;&#x56E0;&#x7D20;&#x90FD;&#x63D0;&#x9AD8;&#x4E86;&#x89C6;&#x89C9;&#x4EFB;&#x52A1;&#x7684;&#x95E8;&#x69DB;&#xFF0C;&#x56E0;&#x6B64;&#xFF0C;&#x5982;&#x679C;&#x80FD;&#x6709;&#x4E00;&#x79CD;&#x6A21;&#x578B;&#x80FD;&#x591F;&#x63A5;&#x6536;&#x5404;&#x79CD;&#x5C3A;&#x5EA6;&#x7684;&#x8F93;&#x5165;&#xFF0C;&#x5E94;&#x5F53;&#x80FD;&#x591F;&#x8BA9;&#x89C6;&#x89C9;&#x4EFB;&#x52A1;&#x66F4;&#x52A0;&#x5BB9;&#x6613;&#x5B8C;&#x6210;&#x3002;</p>
<h2 id="&#x4EC0;&#x4E48;&#x9650;&#x5236;&#x4E86;&#x8F93;&#x5165;&#x7684;&#x5C3A;&#x5BF8;">&#x4EC0;&#x4E48;&#x9650;&#x5236;&#x4E86;&#x8F93;&#x5165;&#x7684;&#x5C3A;&#x5BF8;</h2>
<p>&#x6DF1;&#x5EA6;&#x5377;&#x79EF;&#x795E;&#x7ECF;&#x7F51;&#x7EDC;&#x4E2D;&#x7684;&#x6838;&#x5FC3;&#x7EC4;&#x4EF6;&#x6709;&#x4E24;&#x4E2A;&#xFF0C;&#x4E00;&#x4E2A;&#x662F;CNN&#xFF0C;&#x4E00;&#x4E2A;&#x662F;&#x5168;&#x8FDE;&#x63A5;&#x5C42;&#xFF0C;&#x5377;&#x79EF;&#x662F;&#x7528;filter&#x5728;&#x56FE;&#x50CF;&#x4E0A;&#x5E73;&#x79FB;&#x4E0E;&#x56FE;&#x50CF;&#x7684;&#x5C40;&#x90E8;&#x8FDB;&#x884C;&#x9010;&#x4F4D;&#x4E58;&#x6CD5;&#xFF0C;&#x591A;&#x4E2A;filter&#x5219;&#x4EA7;&#x751F;&#x591A;&#x4E2A;feature map&#xFF08;&#x7279;&#x5F81;/&#x7279;&#x5F81;&#x56FE;&#xFF09;&#xFF0C;&#x7136;&#x540E;&#x53EF;&#x4EE5;&#x7528;pooling&#x64CD;&#x4F5C;&#x8FDB;&#x4E00;&#x6B65;&#x91C7;&#x6837;&#xFF0C;&#x5F97;&#x5230;&#x66F4;&#x5C0F;&#x7684;feature map&#xFF1B;&#x5B9E;&#x9645;&#x4E0A;&#xFF0C;&#x6211;&#x4EEC;&#x5E76;&#x4E0D;&#x5728;&#x610F;feature map&#x6709;&#x591A;&#x5927;&#xFF0C;&#x4E0D;&#x540C;&#x56FE;&#x50CF;&#x7684;feature map&#x5B8C;&#x5168;&#x53EF;&#x4EE5;&#x6709;&#x4E0D;&#x540C;&#x7684;&#x5C3A;&#x5BF8;&#xFF1B;&#x4F46;&#x662F;&#x5728;&#x540E;&#x8FB9;&#x7684;&#x5177;&#x4F53;&#x4EFB;&#x52A1;&#x4E2D;&#xFF0C;&#x6BD4;&#x5982;&#x5206;&#x7C7B;&#x4EFB;&#x52A1;&#xFF0C;&#x4E3A;&#x4E86;&#x8F93;&#x51FA;softmax&#x5BF9;&#x5E94;&#x7684;one-hot&#x5C42;&#xFF0C;&#x9700;&#x8981;&#x8F93;&#x51FA;&#x56FA;&#x5B9A;&#x7684;&#x5C3A;&#x5BF8;&#xFF0C;&#x4E3A;&#x4E86;&#x8BA9;&#x4E0D;&#x540C;&#x7684;&#x8F93;&#x5165;&#x80FD;&#x5171;&#x7528;&#x4E00;&#x5957;&#x6743;&#x91CD;&#x53C2;&#x6570;&#xFF0C;&#x8981;&#x6C42;&#x5168;&#x8FDE;&#x63A5;&#x5C42;&#x7684;&#x8F93;&#x5165;&#x5C3A;&#x5BF8;&#x662F;&#x4E00;&#x81F4;&#x7684;&#xFF0C;&#x9006;&#x63A8;&#x56DE;&#x53BB;&#x4E5F;&#x5C31;&#x9650;&#x5236;&#x4E86;feature map&#x7684;&#x5927;&#x5C0F;&#x5FC5;&#x987B;&#x4E00;&#x81F4;&#xFF1B;&#x800C;&#x4E0D;&#x540C;&#x5C3A;&#x5BF8;&#x7684;&#x8F93;&#x5165;&#x56FE;&#x7247;&#x5728;&#x4F7F;&#x7528;&#x540C;&#x4E00;&#x5957;&#x5377;&#x79EF;&#x6838;&#xFF08;filter&#xFF09;&#x7684;&#x65F6;&#x5019;&#xFF0C;&#x4F1A;&#x4EA7;&#x751F;&#x4E0D;&#x540C;&#x5C3A;&#x5BF8;&#x7684;feature map&#xFF0C;&#x56E0;&#x6B64;&#x624D;&#x9700;&#x8981;&#x5C06;&#x4E0D;&#x540C;&#x5C3A;&#x5BF8;&#x7684;&#x8F93;&#x5165;&#x56FE;&#x7247;&#x901A;&#x8FC7;&#x88C1;&#x526A;&#x3001;&#x62C9;&#x4F38;&#x8C03;&#x6574;&#x4E3A;&#x76F8;&#x540C;&#x7684;&#x5C3A;&#x5BF8;&#x3002;</p>
<h2 id="solution">Solution</h2>
<p>&#x56E0;&#x6B64;&#x7A81;&#x7834;&#x53E3;&#x6709;&#x4E24;&#x4E2A;&#xFF0C;</p>
<ul>
<li>&#x8BA9;&#x5377;&#x79EF;&#x5C42;&#x80FD;&#x4E3A;&#x4E0D;&#x540C;&#x5C3A;&#x5BF8;&#x7684;&#x8F93;&#x5165;&#x4EA7;&#x751F;&#x76F8;&#x540C;&#x5C3A;&#x5BF8;&#x7684;&#x8F93;&#x51FA;&#xFF08;SPP&#xFF09;</li>
<li>&#x8BA9;&#x5168;&#x8FDE;&#x63A5;&#x5C42;&#x80FD;&#x4E3A;&#x4E0D;&#x540C;&#x5C3A;&#x5BF8;&#x7684;&#x8F93;&#x5165;&#x4EA7;&#x751F;&#x76F8;&#x540C;&#x5C3A;&#x5BF8;&#x7684;&#x8F93;&#x51FA;&#xFF08;&#x5168;&#x5377;&#x79EF;&#xFF09;</li>
</ul>
<p>&#x5168;&#x5377;&#x79EF;&#x548C;&#x5377;&#x79EF;&#x7684;&#x533A;&#x522B;&#x5728;&#x4E8E;&#x6700;&#x540E;&#x4E0D;&#x662F;&#x7528;&#x5168;&#x8FDE;&#x63A5;&#x5C42;&#x8FDB;&#x884C;&#x5206;&#x7C7B;&#xFF0C; &#x800C;&#x662F;&#x7528;&#x5377;&#x79EF;&#x5C42;&#xFF0C;&#x5047;&#x8BBE;&#x6211;&#x4EEC;&#x8981;&#x5C06;&#x4E00;&#x4E2A;16x16&#x7684;feature map&#x8F6C;&#x4E3A;10x1&#x7684;one-hot&#x5206;&#x7C7B;&#xFF0C;&#x5219;&#x53EF;&#x4EE5;&#x4F7F;&#x7528;10&#x4E2A;1x1&#x5377;&#x79EF;&#x6838;&#xFF0C;&#x6BCF;&#x4E2A;&#x5377;&#x79EF;&#x6838;&#x5BF9;&#x5E94;&#x4E00;&#x4E2A;&#x5206;&#x7C7B;&#xFF0C;&#x53C2;&#x6570;&#x6570;&#x91CF;&#x5C11;&#x4E86;&#x5F88;&#x591A;&#xFF0C;&#x4F46;&#x662F;&#x2026;&#x5B9E;&#x9A8C;&#x7ED3;&#x679C;&#x8868;&#x660E;&#x8FD8;&#x633A;&#x6709;&#x6548;&#x7684;&#xFF0C;&#x5E76;&#x4E14;&#xFF0C;&#x5168;&#x5377;&#x79EF;+&#x53CD;&#x5377;&#x79EF;&#x5F00;&#x8F9F;&#x4E86;&#x56FE;&#x50CF;&#x5206;&#x5272;&#x7684;&#x65B0;&#x601D;&#x8DEF;&#xFF0C;&#x53EF;&#x4EE5;&#x8BF4;&#x662F;&#x4E00;&#x4E2A;&#x5F00;&#x521B;&#x65B0;&#x7684;&#x5DE5;&#x4F5C;&#x4E86;&#xFF0C;&#x611F;&#x5174;&#x8DA3;&#x7684;&#x540C;&#x5B66;&#x53EF;&#x4EE5;&#x770B;<a href="http://blog.csdn.net/taigw/article/details/51401448" target="_blank">&#x8FD9;&#x7BC7;&#x535A;&#x5BA2;</a></p>
<p>&#x8FD9;&#x91CC;&#x6211;&#x4EEC;&#x8BE6;&#x7EC6;&#x8BB2;&#x4E00;&#x4E0B;SPP</p>
<p><img src="sppnet_1.png" alt="">
SPP&#x4E2D;SP&#xFF08;Spatial Pyramid&#xFF09;&#x7684;&#x601D;&#x60F3;&#x6765;&#x6E90;&#x4E8E;SPM&#xFF08;Spatial Pyramid Matching&#xFF09;&#xFF0C;&#x53EF;&#x4EE5;&#x53C2;&#x8003;<a href="http://blog.csdn.net/jwh_bupt/article/details/9625469" target="_blank">&#x8FD9;&#x7BC7;&#x6587;&#x7AE0;</a>&#xFF0C;&#x6B63;&#x5982;&#x8BBA;&#x6587;Conclusion&#x4E2D;&#x8BF4;&#x7684;&#xFF0C; Our studies also show that many time-proven techniques/insights in computer vision can still play important roles in deep-networks-based recognition.</p>
<p>SPM&#x662F;&#x5728;&#x4E0D;&#x540C;&#x7684;&#x5206;&#x8FA8;&#x7387;&#xFF08;&#x5C3A;&#x5EA6;&#xFF09;&#x4E0B;&#xFF0C;&#x5BF9;&#x56FE;&#x7247;&#x8FDB;&#x884C;&#x5206;&#x5272;&#xFF0C;&#x7136;&#x540E;&#x5BF9;&#x6BCF;&#x4E2A;&#x5C40;&#x90E8;&#x63D0;&#x53D6;&#x7279;&#x5F81;&#xFF0C;&#x5C06;&#x8FD9;&#x4E9B;&#x7279;&#x5F81;&#x6574;&#x5408;&#x6210;&#x4E00;&#x4E2A;&#x6700;&#x7EC8;&#x7684;&#x7279;&#x5F81;&#xFF0C;&#x8FD9;&#x4E2A;&#x7279;&#x5F81;&#x6709;&#x5B8F;&#x89C2;&#x6709;&#x5FAE;&#x89C2;&#xFF08;&#x591A;&#x5C3A;&#x5EA6;&#x91D1;&#x5B57;&#x5854;&#xFF09;&#xFF0C;&#x4FDD;&#x7559;&#x4E86;&#x533A;&#x57DF;&#x7279;&#x6027;&#xFF08;&#x4E0D;&#x540C;&#x7684;&#x533A;&#x57DF;&#x7279;&#x5F81;&#x4E0D;&#x540C;&#xFF09;&#xFF0C;&#x7136;&#x540E;&#x7528;&#x7279;&#x5F81;&#x4E4B;&#x95F4;&#x7684;&#x76F8;&#x4F3C;&#x5EA6;&#x8FDB;&#x884C;&#x56FE;&#x7247;&#x95F4;&#x7684;&#x5339;&#x914D;&#xFF08;matching&#xFF09;&#x3002;&#x5148;&#x524D;&#x6211;&#x4EEC;&#x63D0;&#x5230;&#x8FC7;&#xFF0C;&#x6BCF;&#x4E2A;filter&#x4F1A;&#x5F97;&#x5230;&#x4E00;&#x4E2A;feature map&#xFF0C;SPP&#x7684;&#x8F93;&#x5165;&#x5219;&#x662F;&#x5377;&#x79EF;&#x540E;&#x7684;&#x8FD9;&#x4E9B;feature map&#xFF0C;&#x6BCF;&#x6B21;&#x5C06;&#x4E00;&#x4E2A;feature map&#x5728;&#x4E0D;&#x540C;&#x5C3A;&#x5EA6;&#x4E0B;&#x8FDB;&#x884C;&#x5206;&#x5272;&#xFF0C;&#x5C3A;&#x5EA6;L&#x5C06;&#x56FE;&#x7247;&#x5206;&#x5272;&#x4E3A;<script type="math/tex; ">2^L</script>&#x4E2A;&#x5C0F;&#x683C;&#x5B50;&#xFF08;&#x5176;&#x5B9E;&#x683C;&#x5B50;&#x6570;&#x4E5F;&#x53EF;&#x4EE5;&#x81EA;&#x5DF1;&#x5B9A;&#xFF0C;&#x4E0D;&#x4E00;&#x5B9A;&#x8981;&#x5206;&#x6210;<script type="math/tex; ">2^L</script>&#x4E2A;&#xFF09;&#xFF0C;L&#x4E3A;0&#x4EE3;&#x8868;&#x5168;&#x56FE;&#xFF1B;&#x5BF9;&#x6BCF;&#x4E2A;&#x5C0F;&#x683C;&#x5B50;&#x7684;&#x505A;pooling&#xFF0C;&#x8BBA;&#x6587;&#x4E2D;&#x662F;max pooling, &#x5B9E;&#x9645;&#x4E2D;&#x4E5F;&#x53EF;&#x4EE5;&#x7528;&#x5176;&#x4ED6;&#xFF0C;&#x8FD9;&#x91CC;&#x4E0D;&#x50CF;SPM&#x9700;&#x8981;&#x505A;SIFT&#x4E4B;&#x7C7B;&#x7684;&#x7279;&#x5F81;&#x63D0;&#x53D6;&#xFF0C;&#x56E0;&#x4E3A;feature map&#x5DF2;&#x7ECF;&#x662F;&#x5377;&#x79EF;&#x5C42;&#x63D0;&#x53D6;&#x8FC7;&#x7684;&#x7279;&#x5F81;&#x4E86;&#xFF0C;&#x5C06;pooling&#x5F97;&#x5230;&#x7684;&#x7ED3;&#x679C;&#x62FC;&#x63A5;&#x8D77;&#x6765;&#xFF0C;&#x5C31;&#x53EF;&#x4EE5;&#x5F97;&#x5230;&#x56FA;&#x5B9A;&#x5C3A;&#x5BF8;&#x7684;feature map&#x3002;</p>
<p><img src="sppnet_2.png" alt="">
&#x4E3E;&#x4E2A;&#x4F8B;&#x5B50;&#xFF0C;&#x4E00;&#x4E2A;&#x5177;&#x6709;256&#x4E2A;filter&#x7684;&#x5377;&#x79EF;&#x5C42;&#xFF0C;&#x8F93;&#x51FA;&#x4E86;256&#x4E2A;feature map&#xFF0C;&#x5BF9;&#x4E8E;&#x4E00;&#x4E2A;640x320&#x7684;&#x56FE;&#x7247;&#xFF0C;&#x8F93;&#x51FA;&#x7684;feature map&#x53EF;&#x80FD;&#x662F;32x16&#x7684;&#xFF0C;&#x5BF9;&#x4E8E;&#x4E00;&#x4E2A;640x640&#x7684;&#x56FE;&#x7247;&#xFF0C;&#x8F93;&#x51FA;&#x7684;feature map&#x53EF;&#x80FD;&#x662F;32x32&#x7684;&#xFF0C;&#x5BF9;256&#x4E2A;feature map&#x4E2D;&#x7684;&#x6BCF;&#x4E2A;feature map&#xFF0C;&#x6211;&#x4EEC;&#x5728;4&#x4E2A;&#x5C3A;&#x5EA6;&#x4E0B;&#x5BF9;&#x5B83;&#x4EEC;&#x505A;&#x5207;&#x5272;&#xFF0C;&#x5728;&#x6700;&#x7C97;&#x7CD9;&#x7684;&#x5C3A;&#x5EA6;&#x4E0B;&#x5207;&#x4E3A;1&#x4E2A;&#x56FE;&#xFF0C;&#x6B21;&#x4E4B;&#x5207;&#x4E3A;2&#x4E2A;&#x5B50;&#x56FE;&#xFF0C;&#x63A5;&#x4E0B;&#x6765;&#x662F;4&#x4E2A;&#x5B50;&#x56FE;&#xFF0C;8&#x4E2A;, &#x5BF9;&#x6BCF;&#x4E2A;&#x5B50;&#x56FE;&#x505A;max pooling&#xFF0C;&#x5F97;&#x5230;&#x5176;&#x4E2D;&#x6700;&#x5927;&#x7684;&#x6570;&#xFF0C;&#x653E;&#x5230;&#x6700;&#x7EC8;&#x7684;&#x7279;&#x5F81;&#x91CC;&#xFF0C;&#x53EF;&#x4EE5;&#x5F97;&#x5230;&#x4E00;&#x4E2A;1+2+4+8=15&#x8FD9;&#x4E48;&#x957F;&#x7684;&#x7279;&#x5F81;&#xFF0C;256&#x4E2A;feature&#x5219;&#x53EF;&#x4EE5;&#x5F97;&#x5230;&#x6700;&#x7EC8;256*15&#x8FD9;&#x4E48;&#x957F;&#x7684;&#x7279;&#x5F81;&#xFF0C;&#x53EF;&#x4EE5;&#x770B;&#x5230;&#xFF0C;&#x6700;&#x7EC8;&#x7684;&#x7279;&#x5F81;&#x5C3A;&#x5BF8;&#x53EA;&#x8DDF;&#x5377;&#x79EF;&#x5C42;&#x7ED3;&#x6784;&#x548C;SP&#x5C3A;&#x5EA6;L&#x6709;&#x5173;&#xFF0C;&#x8DDF;&#x8F93;&#x5165;&#x56FE;&#x7247;&#x65E0;&#x5173;&#xFF0C;&#x4ECE;&#x800C;&#x4FDD;&#x8BC1;&#x4E86;&#x5BF9;&#x4E0D;&#x540C;&#x5C3A;&#x5BF8;&#x7684;&#x56FE;&#x7247;&#x90FD;&#x8F93;&#x51FA;&#x4E00;&#x6837;&#x5927;&#x5C0F;&#x7684;&#x7279;&#x5F81;&#x3002;</p>
<p>&#x5176;&#x5B9E;&#x770B;&#x5230;&#x8FD9;&#x91CC;&#xFF0C;&#x4F60;&#x53EF;&#x80FD;&#x53D1;&#x73B0;&#x4E86;&#xFF0C;&#x5BF9;&#x4E0D;&#x540C;&#x5C3A;&#x5BF8;&#x8F93;&#x51FA;&#x76F8;&#x540C;&#x5C3A;&#x5BF8;&#x7279;&#x5F81;&#x8FD9;&#x4E2A;&#x7279;&#x6027;&#xFF0C;&#x662F;&#x7531;pooling&#x64CD;&#x4F5C;&#x51B3;&#x5B9A;&#x7684;&#xFF0C;&#x50CF;max pooling&#xFF0C;sum pooling&#x8FD9;&#x4E9B;&#xFF0C;&#x5C31;&#x662F;&#x5C06;&#x591A;&#x4E2A;&#x8F93;&#x5165;&#x805A;&#x5408;&#x4E3A;&#x4E00;&#x4E2A;&#x503C;&#x7684;&#x8FD0;&#x7B97;&#xFF1B;&#x800C;Spatial Pyramid&#x53EA;&#x662F;&#x8BA9;&#x7279;&#x5F81;&#x6709;&#x66F4;&#x597D;&#x7684;&#x7EC4;&#x7EC7;&#x5F62;&#x5F0F;&#x800C;&#x5DF2;&#x3002;&#x5F53;&#x7136;&#xFF0C;&#x80FD;&#x627E;&#x5230;&#x8FD9;&#x79CD;&#x6709;&#x6548;&#x7684;&#x7279;&#x5F81;&#x7EC4;&#x7EC7;&#x5F62;&#x5F0F;&#x4E5F;&#x662F;&#x5F88;&#x503C;&#x5F97;&#x80AF;&#x5B9A;&#x7684;&#x3002;&#x4F46;&#x8FD9;&#x91CC;&#x6709;&#x4E1C;&#x897F;&#x4ECD;&#x7136;&#x503C;&#x5F97;&#x5546;&#x69B7;&#xFF0C;max pooling&#x5B9E;&#x9645;&#x4E0A;&#x8FD8;&#x662F;&#x4E22;&#x4E86;&#x4E00;&#x4E9B;&#x4FE1;&#x606F;&#xFF0C;&#x867D;&#x7136;&#x901A;&#x8FC7;&#x591A;&#x5C42;&#x7684;&#x7279;&#x5F81;&#x53EF;&#x4EE5;&#x5C06;&#x8FD9;&#x4E9B;&#x4FE1;&#x606F;&#x5F25;&#x8865;&#x56DE;&#x6765;&#x3002;</p>
<h2 id="&#x5B9E;&#x9A8C;">&#x5B9E;&#x9A8C;</h2>
<p>&#x7136;&#x540E;&#x4F5C;&#x8005;&#x5C31;&#x5C06;&#x8FD9;&#x4E2A;&#x7ED3;&#x6784;&#x5E94;&#x7528;&#x5230;&#x5404;&#x79CD;&#x7F51;&#x7EDC;&#x7ED3;&#x6784;&#x548C;&#x5404;&#x79CD;&#x4EFB;&#x52A1;&#x91CC;&#x4E86;&#xFF0C;&#x5E76;&#x4E14;&#x90FD;&#x53D6;&#x5F97;&#x4E86;&#x5F88;&#x597D;&#x7684;&#x6548;&#x679C;&#xFF08;&#x8BF4;&#x7684;&#x8F7B;&#x5DE7;&#xFF0C;&#x590D;&#x73B0;&#x4E00;&#x5806;&#x8BBA;&#x6587;&#xFF0C;&#x6539;&#x6E90;&#x7801;&#xFF0C;&#x8DD1;&#x5927;&#x91CF;&#x5B9E;&#x9A8C;&#xFF0C;&#x4E00;&#x5B9A;&#x8D85;&#x7EA7;&#x7D2F;&#xFF09;&#xFF1B;&#x7279;&#x522B;&#x662F;&#x5728;&#x68C0;&#x6D4B;&#x4EFB;&#x52A1;&#x5BF9;RCNN&#x7684;&#x6539;&#x8FDB;&#x4E0A;&#xFF0C;&#x8FD9;&#x4E2A;&#x5730;&#x65B9;&#x6BD4;&#x8F83;&#x6709;&#x610F;&#x601D;&#x3002;&#x5728;RCNN&#x4E2D;&#xFF0C;&#x9700;&#x8981;&#x5C06;&#x6BCF;&#x4E2A;Region Proposal&#x8F93;&#x5165;&#x5377;&#x79EF;&#x5C42;&#x5224;&#x65AD;&#x5C5E;&#x4E8E;&#x54EA;&#x4E2A;&#x5206;&#x7C7B;&#xFF0C;&#x800C;region proposal&#x662F;&#x65B9;&#x5F62;&#x7684;&#xFF0C;&#x8FD9;&#x5C31;&#x5BFC;&#x81F4;&#x6709;&#x5F88;&#x591A;&#x533A;&#x57DF;&#x505A;&#x4E86;&#x91CD;&#x590D;&#x7684;&#x5377;&#x79EF;&#x8FD0;&#x7B97;&#x3002;</p>
<p>&#x5728;SPP-net&#x7684;&#x5B9E;&#x9A8C;&#x4E2D;&#xFF0C;</p>
<ul>
<li>&#x6574;&#x5F20;&#x56FE;&#x53EA;&#x8FC7;&#x4E00;&#x904D;&#x5377;&#x79EF;&#x5C42;&#xFF0C;&#x4ECE;conv5&#x5F97;&#x5230;&#x6574;&#x5F20;&#x56FE;&#x5BF9;&#x5E94;&#x7684;feature map&#xFF1B;</li>
<li>&#x7136;&#x540E;&#x5C06;feature map&#x4E2D;&#x6BCF;&#x4E2A;region proposal&#x5BF9;&#x5E94;&#x7684;&#x90E8;&#x5206;&#x63D0;&#x53D6;&#x51FA;&#x6765;&#xFF0C;&#x8FD9;&#x4E2A;&#x4F4D;&#x7F6E;&#x8BA1;&#x7B97;&#x91CF;&#x4E5F;&#x4E0D;&#x5C0F;&#xFF0C;&#x4F46;&#x6BD4;&#x7B97;&#x5377;&#x79EF;&#x672C;&#x8EAB;&#x8FD8;&#x662F;&#x8981;&#x5FEB;&#x5F88;&#x591A;&#xFF0C;&#x539F;&#x56FE;&#x4E2D;&#x7684;&#x4E00;&#x4E2A;&#x533A;&#x57DF;&#x552F;&#x4E00;&#x5BF9;&#x5E94;&#x4E8E;feature map&#x4E2D;&#x7684;&#x4E00;&#x4E2A;&#x533A;&#x57DF;&#xFF0C;&#x4E0D;&#x8FC7;feature map&#x4E2D;&#x7684;&#x4E00;&#x4E2A;&#x533A;&#x57DF;&#x5B9E;&#x9645;&#x4E0A;&#x5BF9;&#x5E94;&#x539F;&#x56FE;&#x7684;&#x8303;&#x56F4;&#xFF08;&#x6240;&#x8C13;&#x611F;&#x53D7;&#x91CE;&#xFF09;&#x8981;&#x5927;&#x4E8E;region proposal&#x6240;&#x5728;&#x533A;&#x57DF;&#xFF0C;&#x4ECE;&#x8FD9;&#x4E2A;&#x610F;&#x4E49;&#x4E0A;&#x6765;&#x8BB2;&#xFF0C;&#x4F9D;&#x7136;&#x662F;&#x63A5;&#x6536;&#x4E86;&#x66F4;&#x591A;&#x4E0D;&#x76F8;&#x5173;&#x4FE1;&#x606F;&#xFF0C;&#x4F46;&#x662F;&#x597D;&#x5728;&#x6CA1;&#x6709;&#x88C1;&#x526A;&#x6216;&#x53D8;&#x5F62;&#xFF1B;</li>
<li>&#x7531;&#x4E8E;region proposal&#x5F62;&#x72B6;&#x4E0D;&#x4E00;&#xFF0C;&#x5BF9;&#x5E94;&#x7684;feature map&#x5C3A;&#x5BF8;&#x4E5F;&#x4E0D;&#x4E00;&#x81F4;&#xFF0C;&#x8FD9;&#x65F6;SPP&#x5C31;&#x80FD;&#x5145;&#x5206;&#x53D1;&#x6325;&#x5176;&#x7279;&#x6027;&#xFF0C;&#x5C06;&#x4E0D;&#x540C;&#x5C3A;&#x5BF8;&#x7684;feature map&#x8F6C;&#x4E3A;&#x5C3A;&#x5BF8;&#x4E00;&#x81F4;&#x7684;feature&#xFF0C;&#x4F20;&#x7ED9;&#x5168;&#x8FDE;&#x63A5;&#x5C42;&#x8FDB;&#x884C;&#x5206;&#x7C7B;</li>
<li>&#x539F;&#x56FE;&#x5B9E;&#x9645;&#x4E0A;&#x53EF;&#x4EE5;&#x4FDD;&#x6301;&#x539F;&#x56FE;&#x7684;&#x5BBD;&#x9AD8;&#x6BD4;&#x7F29;&#x653E;&#x5230;&#x591A;&#x79CD;&#x5C3A;&#x5EA6;&#xFF08;&#x6587;&#x4E2D;&#x5C06;&#x5BBD;&#x6216;&#x9AD8;&#x7F29;&#x653E;&#x5230;{480, 576, 688, 864, 1200}&#x8FD9;&#x4E94;&#x4E2A;&#x5C3A;&#x5BF8;&#xFF0C;&#xFF09;&#xFF0C;&#x5206;&#x522B;&#x7B97;&#x4E00;&#x4E2A;&#x7279;&#x5F81;&#xFF0C;&#x5C06;&#x4E0D;&#x540C;&#x5C3A;&#x5EA6;&#x7684;&#x7279;&#x5F81;&#x62FC;&#x63A5;&#x8D77;&#x6765;&#x8FDB;&#x884C;&#x5206;&#x7C7B;&#xFF0C;&#x8FD9;&#x79CD;combination&#x7684;&#x65B9;&#x5F0F;&#x80FD;&#x4E00;&#x5B9A;&#x7A0B;&#x5EA6;&#x4E0A;&#x63D0;&#x9AD8;&#x7CBE;&#x5EA6;</li>
<li>&#x8FD9;&#x91CC;&#x8FD8;&#x6709;&#x4E00;&#x4E2A;&#x5C0F;trick&#xFF0C;&#x53EF;&#x4EE5;&#x5C06;&#x539F;&#x56FE;&#x7F29;&#x653E;&#x5230;&#x9762;&#x79EF;&#x63A5;&#x8FD1;&#x7684;&#x8303;&#x56F4;&#xFF08;&#x6587;&#x4E2D;&#x662F;224x224&#xFF09;&#xFF0C;&#x518D;&#x8F93;&#x5165;&#x5230;&#x7F51;&#x7EDC;&#x4E2D;&#xFF0C;&#x8FDB;&#x4E00;&#x6B65;&#x63D0;&#x5347;&#x7CBE;&#x5EA6;&#xFF0C;&#x81F3;&#x4E8E;&#x539F;&#x56E0;&#x2026;&#x6587;&#x4E2D;&#x6CA1;&#x6709;&#x63D0;&#xFF0C;&#x7384;&#x5B66;&#x89E3;&#x91CA;&#x662F;&#xFF0C;&#x8F93;&#x5165;&#x7684;&#x5C3A;&#x5EA6;&#x66F4;&#x63A5;&#x8FD1;&#xFF0C;&#x6A21;&#x578B;&#x8BAD;&#x7EC3;&#x66F4;&#x5BB9;&#x6613;&#x5427;&#x3002;</li>
</ul>
<p>&#x7531;&#x4E8E;&#x6574;&#x5F20;&#x56FE;&#x53EA;&#x8FC7;&#x4E86;&#x4E00;&#x904D;&#x5377;&#x79EF;&#xFF0C;&#x6240;&#x4EE5;&#x6BD4;&#x539F;&#x6765;&#x7684;RCNN&#x5FEB;&#x4E86;&#x5F88;&#x591A;&#xFF0C;&#x51C6;&#x786E;&#x7387;&#x4E5F;&#x4E0D;&#x5DEE;</p>
<p><img src="sppnet_3.png" alt=""></p>
<h2 id="summary">Summary</h2>
<p>&#x4E25;&#x683C;&#x6765;&#x8BB2;SPP-net&#x4E0D;&#x662F;&#x4E3A;detection&#x800C;&#x751F;&#x7684;&#x6A21;&#x578B;&#xFF0C;&#x4F46;&#x662F;SPP-net&#x4E3A;RCNN&#x8FDB;&#x5316;&#x5230;Fast-RCNN&#x8D77;&#x4E86;&#x5F88;&#x5927;&#x7684;&#x501F;&#x9274;&#x4F5C;&#x7528;&#xFF0C;&#x503C;&#x5F97;&#x4E00;&#x8BFB;&#x3002;SPP-net&#x7684;&#x60F3;&#x6CD5;&#x5F88;&#x6709;&#x610F;&#x601D;&#xFF0C;SPP&#xFF08;Spatial Pyramid Pooling&#xFF09;&#x662F;&#x5BF9;&#x7F51;&#x7EDC;&#x7ED3;&#x6784;&#x7684;&#x4E00;&#x79CD;&#x6539;&#x8FDB;&#xFF0C;&#x53EF;&#x80FD;&#x56E0;&#x4E3A;&#x662F;&#x534E;&#x4EBA;&#x5199;&#x7684;&#x8BBA;&#x6587;&#xFF0C;&#x611F;&#x89C9;&#x5F88;&#x597D;&#x8BFB;&#xFF0C;&#x542B;&#x91D1;&#x91CF;&#x4E2A;&#x4EBA;&#x611F;&#x89C9;&#x6CA1;&#x6709;RCNN&#x6216;&#x8005;DPM&#x7684;&#x8BBA;&#x6587;&#x9AD8;&#xFF0C;&#x4F46;&#x662F;&#x5B9E;&#x9A8C;&#x5F88;&#x4E30;&#x5BCC;&#xFF0C;&#x4ECE;&#x5206;&#x7C7B;&#x4EFB;&#x52A1;&#x548C;&#x68C0;&#x6D4B;&#x4EFB;&#x52A1;&#x4E0A;&#x7684;&#x5404;&#x79CD;&#x7F51;&#x7EDC;&#x7ED3;&#x6784;&#x8BC1;&#x660E;SPP&#x7684;&#x6709;&#x6548;&#x6027;</p>

                                
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